IntegumentIII

IntegumentIII - The Integumentary System III Sensory...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
The Integumentary System III
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Sensory Receptors The skin and subcutaneous tissue contains receptors that respond to stimuli such as touch, pressure, heat, cold, and pain
Background image of page 2
Sensory Receptors Sensory receptors can be classified based on the type of stimulus to which the receptor responds: 1. Mechanoreceptor Responds to mechanical deformation of the tissue or receptor itself 2. Thermoreceptors Responds to warmth or cold 3. Nociceptors Respond to painful stimuli
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Sensory Receptors (continued) 1. Meissner corpuscle (encapsulated) Found in dermal papillae and accounts for half of the tactile receptors of the digits and hand; thought to discriminate shape and texture 2. Merkel cell Nerve ending discriminates touch and forms a flat discoid structure attached to the Merkel cell (found in stratum basale) 3. Free nerve endings Lacks myelin covering, responds to pressure, pain and temperature stimuli 4. Pacinian corpuscle (encapsulated) Found in hypodermis, responds to transient vibratory stimuli and is the receptor for deep pressure 5. Peritrichial nerve ending Wrapped around the base and shaft of hair follicle; movement of hair is sufficient to stimulate
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Hair • Hair follicles are tubular invaginations of the epidermis responsible for growth of hair • Hair follicles are constantly renewing, alternating phases of growth with regression and rest
Background image of page 6
Hair Each hair follicle consists of two parts: 1. Hair shaft Filamentous keratinized structure present almost all over the body surface, except on thick skin of palms and soles, sides of fingers and toes 2. Hair bulb Expanded end portion of the invaginated hair follicle, a vascularized connective tissue core (dermal papilla) projects into the hair bulb
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/05/2011 for the course APC 100 taught by Professor Kelliewhited during the Spring '07 term at UC Davis.

Page1 / 32

IntegumentIII - The Integumentary System III Sensory...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online